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30 lines
749 B
C
30 lines
749 B
C
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/* adler32_ssse3_p.h -- adler32 ssse3 utility functions
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* Copyright (C) 2022 Adam Stylinski
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#ifndef ADLER32_SSSE3_P_H_
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#define ADLER32_SSSE3_P_H_
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#ifdef X86_SSSE3
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#include <immintrin.h>
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#include <stdint.h>
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static inline uint32_t partial_hsum(__m128i x) {
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__m128i second_int = _mm_srli_si128(x, 8);
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__m128i sum = _mm_add_epi32(x, second_int);
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return _mm_cvtsi128_si32(sum);
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}
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static inline uint32_t hsum(__m128i x) {
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__m128i sum1 = _mm_unpackhi_epi64(x, x);
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__m128i sum2 = _mm_add_epi32(x, sum1);
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__m128i sum3 = _mm_shuffle_epi32(sum2, 0x01);
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__m128i sum4 = _mm_add_epi32(sum2, sum3);
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return _mm_cvtsi128_si32(sum4);
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}
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#endif
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#endif
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